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| Telnet to Root via SD card custom firmware upgrade
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| 1. Download Hikvision packer/unpacker (to Linux PC):
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| https://ipcamtalk.com/threads/mcr-hikvision-packer-unpacker-for-5-3-x-and-newer-firmware.15710/
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| 2. Download original firmware:
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| https://prod-peq-a-firmware-uploads.s3.amazonaws.com/firmware/Hikvision/MOCAM-720-01/V5.1.8 build 170829/digicap.dav?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAI3CJ5PEMTCV2KBOA/20180422/us-east-1/s3/aws4_request&X-Amz-Date=20180422T154301Z&X-Amz-Expires=604799&X-Amz-SignedHeaders=host&X-Amz-Signature=830a05ea9c676973fb282c53f70c6442eed9ba8894afbf0902652fd475ca0252
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| 3. ./hikpack -t r0 -x digicap.dav -o newfw
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| 4. cd newfw
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| 5. unsquahsfs app.img
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| 6. cd squashfs-root
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| 7. nano initrun.sh and add '/bin/busybox telnetd &' to the end to enable telnet (or make any changes you want)
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| 8. cd ..
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| 9. mksquashfs squashfs-root/ app.img -comp xz -b 256K -noappend -force-uid 4145 -force-gid 4148
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| 10. rm -rf squashfs-root
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| 11. ./hikpack -t r0 -p ezviz.dav -o newfw
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| 12. Copy ezviz.dav to SD card
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| 13. Insert SD card to camera
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| 14. Reboot camera
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| 15. Log in to telnet with root/EHLGVG
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| *NOTE: This works because the current version of the firmware checks for the existence of 'ezviz.dav' when booting up. Also, the root password is hard-coded to all devices.
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